Re: atoi-like function: is there a better way to do this?

On Mar 5, 2012, at 0:08, Chris Angelico <rosuav(at)gmail(dot)com> wrote:

> On Mon, Mar 5, 2012 at 3:15 PM, Tom Molesworth <tom(at)audioboundary(dot)com> wrote:
>> Can you use to_number() here? It sounds like something along the lines of
>> cast(to_number('0' || field::varchar, '999999999.') as int) might give the
>> behaviour you're after, and a quick test seems to indicate that it's about
>> 4x faster than the original function:
>
> I looked at to_number but it seems to find digits anywhere inside the
> field - to_number('12.34','99999') returns 1234, but I want it to stop
> at the decimal.
>
> Nice trick with prepending a zero though - I didn't think of that.
> That may save some hassle!
>
> ChrisA
>
>

0alpha999 -> 0
alpha999 -> 999